Form roll drive



Se t. 10, 1935. H. A. w. WOOD 5 FORM ROLL DRIVE Original Filed May 11, 1952 2 Sheets-Sheet l Sept. 10, 1935. w WOOD 2,014,095

FORM ROLL DRIVE Original Filed May 11, 1932 2 Sheets-Sheet 2 Patented Sept. 10, 1935 UNITED STATES PATENT OFFICE FORM ROLL DRIVE Application May 11, 1932, Serial No. 610,551 Renewed February 6, 1935 6 Claims. (Cl. 101-349) This is an improvement over my application for patent, Serial No. 518,713, filed February 27, 1931 and relates to printing presses.

The principal objects of this invention are to provide positive driving means for the form rolls in an inking mechanism in a more simplified form than before; to provide a construction in which the end clamps for the printing plates can be used to serve the purpose of driving the form roll at the speed of the printing surface and to provide a construction in which the moving of the end clamps to clampand unclamp the plates while in contact with the means by which the form roll is driven from them will take place easily as they slide over the driving surface without injury thereto.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings, in which Fig. 1 is an end view of a printing and inking mechanism for a newspaper printing press showing this invention as applied thereto;

Fig. 2 is a sectional view of the same on enlarged scale;

Fig. 3 is a sectional view on the line 3-3 of Fig. 2;

Fig. 4 is a sectional view of the element on the form roll through which the form roll is driven, and

Fig. 5 is a fragmentary side elevation showing two of the end clamps with their means for driving the form roll.

In my above identified application I set forth the advantages to be gained by driving the form roll, which is used in applying the ink to the printing plates, and the advantages of driving this form roll at the same surface speed as that of the printing plate cylinder. This invention relates to a simplification of the means for driving the form rolls particularly, although it involves other features.

Referring to the drawings, the plate cylinder I is provided with the usual inking mechanism ll comprising two form rolls l2. The plate cylinder is provided with end clamps l3 which are moved, as by screws I4 in the usual way, along longitudinal slots IS in the plate cylinder ID to clamp and unclamp the plates P. These end clamps can be arranged in any desired way and are shown herein as provided with extensions having surfaces l1 corrugated longitudinally of the plate, either by gear teeth or any other irregular surface designed to give traction. These end clamps normally are arranged in sections and extend entirely around the printing plate cylinder I-Il so that these corrugations l1 constitute a continuous circular rack.

Each form roll I2 is provided on its end with a roll l8- of metal removably fixed to the form roll and on the surface of this roll is secured, by adhesive material or in any desired way, a collar [9 of rubber or other yielding material. The surface of this collar I9 is preferably of the same diameter as that of the form roll and when the 10 roll is ground, this collar can be ground with it so as always to provide it with exactly the right diameter. If found necessary, however, this removable collar may be ground separately to give a slightly larger or smaller diameter to suit the conditions found most favorable. Also it" will be understood that the exterior surface of the corrugations I1 is of exactly the same diameter as the diameter of the plate cylinder clothed fully with plates. Therefore the corrugations on the end clamps l3 will drive the form roll l2 through the collar H3, at exactly the surface speed of the plates on that any change in speed of the plate cylinder will be transmitted directly and instantly to the form roll.

that the rubber collar I9 is so arranged that it will keep the right diameter. By carrying this drive on a removable portion of the form roll and on the plate clamp, application to the existing installations can be made easily as it is necessary only to slip the attachment on the form roll and to replace the ordinary plate clamp with the new one.

There is a distinct advantage gained by making the corrugations on the plate clamps parallel 40 with the cylinder axis. When the clamp is moved to clamp or unclamp the plate while the plate is in contact with the form roller, these corrugations will slide easily and longitudinally over the driving element IS without injury thereto.

It is apparent that a positive drive is imparted to the form rolls through the instrumentality of a full corrugated path carried on the plate cylinder. It is not only when the press is being accelerated and decelerated that this is advantageous but also when the press is running along at a constant speed. In ordinary presses, even then, the form roll is not always driven up to web speed, as is desirable, because of the slippery contact between the form roll and plate. The plate clamps 13 might carry a smooth surface and drive the form roll properly because there is no ink on this surface. This in itself is advantageous over any arrangement whereby the form roll is driven by the plate because the plate which has a certain amount of projections that could help to drive the form roll is not always suflicient. Some plates are comparatively smooth and, even where that is not the case, the whole surface of the plate and form roll are covered with ink which has a carrier of oil tending to lubricate both rolls and thus clearly impairing the driving qualities. The extensions on the plate clamps, of course, are free from ink and so is the collar [9. Therefore, even without the corrugations, this arrangement constitutes a good drive. One of the distinct advantages to be derived from driving a form roll is that only the top and not the sides of the type is inked, therefore a delicate setting may be used, and this manner of inking is conducive of good printing.

Although I have illustrated and described only one form of the invention I am aware of the fact that modifications can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in the claims. Therefore I do not wish to, be limited in this respect otherwise than as set forth in the claims, but what I do claim is:-

1. In an inking mechanism, the combination with a form roller and a plate cylinder having end plate clamps thereon, of means for driving the form roll from the plate cylinder through the end clamps.

2. In an inking device for a printing machine, the combination with a plate cylinder having longitudinal movable end clamps for the plates arranged in a substantially continuous circle around the cylinder, of a form roller in position to apply ink to the plates on the plate cylinder, and means on the form roller beyond its inking surface in position to have imparted to it and to the form rollers through it, a motion of rotation from said continuous series of plate clamps.

3. In an inking device for a printing machine,

the combination with a plate cylinder, of a form roll, a roll fixed to the form roll beyond the ink surface thereof, and means on the plate cylinder beyond the printing plates for driving the form roll from the plate cylinder.

4. In an inking device for a printing machine, the combination with a plate cylinder and longitudinal movable end clamps thereon, said plate clamps having a corrugated surface located beyond the plates, of a form roll in contact with 10 the plates on the plate cylinder, a roll fixed to the form roll beyond the ink surface thereof, and a yielding collar fixed to said roll and contacting with said corrugated surface for driving the form roll from the plate cylinder. 15

5. In an inking device for a printing machine, the combination with a plate cylinder and end plate clamps thereon, said plate clamps having a corrugated surface located beyond the plates, of a form roll in contact with the plates on the plate cylinder, a roll fixed to the form roll beyond the ink surface thereof, a collar fixed to the roll and contacting with said corrugated surface for driving the form roll from the plate cylinder, the diameter of said collar being the same as the diameter of the form roll and the diameter of the corrugations on the plate clamps being the same as the diameter of the plate cylinder clothed with plates.

6. In an inking device for a printing machine, the combination with a plate cylinder and longitudinal movable end plate clamps thereon, said plate clamps having a corrugated surface located beyond the plates, of two form rolls in contact with the plates on the plate cylinder, 2. roll fixed to each form roll beyond the ink surface thereof,

a rubber collar fixed to each roll and contacting with said corrugated surface for driving the form rolls from the plate cylinder, the diameters of said collars being exactly the same as the diameters of the form rolls and the diameter of the corrugations on the plate clamps being exactly the same as the diameter of the plate cylinder clothed with plates.

NRY A. WISE WOOD. 

